PHPBay Is it worth it

Getting ready to plunk down money on PHPbay, wondering if it is worth the $79.00? I am using phpbay lite and only averaging about 20.00 a month...thinking buying the full version would be better.

Any advise would be greatly appreciated!!
Thanks,
Jen

by the way depending on the responses I will use someones affiliate link if you want to pm it to me